URL redirection is a Blogger magic trick, similar to a common sleight of hand trick in stage magic performances.

The Blogger HTTPS Redirection, a recently added feature in Blogger security, may be a similar Blogger magic trick - and a possible problem. Some browsers treat websites with multiple redirects as possibly malicious.

Some blog owners speak / write in multiple languages - and want to interact with their different readers, separately, in each different language.

Blogger, and Google, support the need for publishing multiple blogs, each written in a different language. The "hreflang" tag, added to a blog, identifies other blogs, published to different languages, with identical or similar content.

Many people who publish blogs also have FaceBook pages - and one of the easiest ways to get traffic, to the blog, is to share the blog to a FaceBook page.

Some people want money for publishing their blogs. AdSense is a very popular way to earn from publishing. AdSense produces the best results, with lots of readers to read the blog, click on the ads, and buy the products and services advertised.

FaceBook, and similar social network sharing services, is not the best choice for advertising a blog that uses AdSense ads.